package com.yh.cart.controller;

import com.yh.cart.interceptor.CartInterceptor;
import com.yh.cart.service.CartService;
import com.yh.cart.vo.Cart;
import com.yh.cart.vo.CartItem;
import com.yh.cart.vo.UserInfoTo;
import com.yh.common.constant.AuthServiceConstant;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.servlet.http.HttpSession;
import java.util.List;
import java.util.concurrent.ExecutionException;

@Controller
public class CartController {

    @Autowired
    CartService cartService;

    @GetMapping("/currentUserCartItem")
    @ResponseBody
    public List<CartItem> getCurrentUserCartItem(){

        return cartService.getUserCheckCartItems();
    }

    @GetMapping("/deleteItem")
    public String deleteItem(@RequestParam("skuId") Long skuId){
        cartService.deleteItem(skuId);
        return "redirect:http://cart.gulimall.com/cart.html";
    }

    @GetMapping("/countItem")
    public String countItem(@RequestParam("skuId") Long skuId,
                            @RequestParam("num") Integer num){
        cartService.changeItemCount(skuId,num);
        return "redirect:http://cart.gulimall.com/cart.html";
    }

    @GetMapping("/checkItem")
    public String checkItem(@RequestParam("skuId") Long skuId,
                            @RequestParam("checked") Integer checked){
        cartService.checkItem(skuId,checked);
        return "redirect:http://cart.gulimall.com/cart.html";
    }

    /**
     * 跳转到购物车页
     * 浏览器有一个cookie：user-key；表示用户身份，一个月后才会过期（临时用户）
     * 如果第一次使用购物车功能，都会给一个临时的用户身份
     * 以后每一次访问都会带上这个cookie
     *
     * 登录：session有
     * 未登录：按照cookie里面带来的user-key来做
     * 第一次：没有临时用户，也没有登录，帮忙创建一个用户。
     * 采用拦截器判断
     * @return
     */
    @GetMapping("/cart.html")
    public String cartListPage(Model model) throws ExecutionException, InterruptedException {
        //1、快速得到用户信息 id user-key  借用了threadLocal
//        UserInfoTo userInfoTo = CartInterceptor.threadLocal.get();
//        System.out.println(userInfoTo);
        Cart cart=cartService.getCart();
        model.addAttribute("cart",cart);
        return "cartList";
    }

    /**
     * 添加商品到购物车
     * @param skuId 商品id
     * @param num 数量
     * @return
     */
    @GetMapping("/addToCart")
    public String addToCart(@RequestParam("skuId") Long skuId,
                            @RequestParam("num") Integer num,
                            RedirectAttributes attributes) throws ExecutionException, InterruptedException {
        CartItem cartItem=cartService.addToCart(skuId,num);
        attributes.addAttribute("skuId",skuId);
        return "redirect:http://cart.gulimall.com/addToCartSuccess.html";
    }
    //防止添加操作一直刷
    @GetMapping("/addToCartSuccess.html")
    public String addToCartSuccessPage(@RequestParam("skuId")Long skuId,Model model){
        //重定向到成功页面。然后再次查询购物车数据即可
        CartItem cartItem=cartService.getCartItem(skuId);
        model.addAttribute("item",cartItem);
        return "success";
    }
}
